Loom-shuttle.



W. MUCASLIN. LOGM SHUTTLE. APPLIUATION FILED PEB. e, 1911.

Patented Feb. 20, 1912.

- NTED STATES PATENT OFFICE.

WILLIAM MCCASLIN, OF HOPEDALE, MASSACHUSETTS, .ASSIGNOR-TO DRAPER COM- PANY, OF HOPEDALE, MASSACHUSETTS, A'CORPORATION OF- MAINE.

LOOM-SHUTTLE.

Specification of le'tters Patent. Patented Feb. 20, 1912.

Application led February 6, 1911. Serial No. 606,729.-

Toy all 'whom it may concern:

Be it known that I, XVILLIAM MCCASLIN, a citizen of the United States, and resident of Hopedale, county of lVorcester, State ol' Massachusetts, have invented an Improve-I This invention relates more particularly to loom shuttles wherein the bobbin-holding jaws are formed of a'V relatively thin strip lof spring-metalfolded or bent upoznitself between `its ends and then out-turned t0 form the jaws, the folder base portion be-l ing inserted in a recess in the shuttle-body at the end of the jbobbin-receiving opening.

A loom-shuttle of this general.const-rue.l tion is shown --in United States Patent No. 906,390 granted-December 8, 1908 to Cunniff and Cookson, and as therein'shown the base portion of the bobbin-holding device is drilled for the passage of a: retaining bolt, and a distance-piece or spreader is inserted between the folded parts of the device to maintain the same firmly seated in the recess 'of the shuttle-body.V 1

It will be. understood by those skilled in the art that whenever a bobbinv is inserted in the shuttle the jaws are flexed or sprung apart, and said jaws spring inward whenever a bobbin is discharged from the shuttle, so that in actual practice there, is a frequent changing of the position ofthe holding de'- vice between the free ends of the jaws and the parts of the base'drilled for the reception of the retaining bolt. Such drilled parts are, manifestly, weakened by the formation of the drill holes, and it has been found in pracs tice that the walls .of the'receiving recess between its inner end and the retaining bolt are worn and spread apart by the frequently recurring change of bobbins. Consequently the adjacent portions of the .jaw bases are allowed gradually to expand and contractfrom the jaws to the bolt holes, when filling change occ-urs, with the result that the bobbin-holding'device breaks at such holes and the shuttle is worthless until a newholding device is inserted.

The present invention has for its object the production of means for backing up and 'coperating with the bobbin-holding evicein such manner that the exing of the same is confined to the jaw portions thereof outl' y side the recessed part of the shuttle-bodjg''so that the base part containing by the insertion or ejection of a bobbin.

'The various novel features of the invention will be fully described in the subjoined specification'v and particularly pointed out in the follo'wing claim.

Figure 1 is a top plan view of the bobbinholding end of a loom-shuttle embodying one form of t-he present invention; Fig. 2 is a portion, and particularly that"v he bolt holes, is unaffected longitudinal section thereof on the line 2-2,

Fig. 1; Fig. 3 is a parti-al horizontal sectional detail on the line 3 3, Fig. 2; Fig; 4'

is 4a perspective view of the backing and strengthening member, detached;

The shuttle body 1 having the opening 2 for the reception of the filling-carrier or b Obbin, the longitudinal recess 3 formed in the shuttle-wood to receive the jaw bases f1 of the holding device, the latter formed by bendingior folding a strip of spring-metal upon itself between its ends, the outeturned ends 5 ofthe bases, terminating in the opposed holding jaws igrooved at 7 `on their inner faces, and the transverse retaining .bolt 9 passedthrough holes 8 drilled inthe jaw bases, may be and are all substantially as in the patent referred to, with the exception that herein the recess-3 is wider` than in'said patent..

The bolt 9 is headedv at one end and at its other end provided with a retaining nut 10, as usual, and between the j aw' bases 4 a suitable spreader 11- is inserted, herein shown as a staple-like-pi,ece of metal which st-raddles the bolt, but no claim is herein made to the particular lform of the spreader, as the same jis not`yer 86a part of this invention, the

function of the spreader being to space apart the jaw bases.

The backing and strengthening member,

flol

shown separately in Fig. '4,' is in practice made of a strip o f resilient plate metal bent into an elongated U-shape, at 12, and curved outwardly at its free ends, at 13, the substantially parallel sides of the bodyl 12 being provided with opposite b0ltholes 14. The general shape and dimensions of the said member rare such that its body 12 will litsnugly into the recess 3 in the shuttlebody and the jaw bases 4 in turn fit snugly within the body 12, as clearly shown in Figs.

1 and 3, the free' ends 13 of the backing member having the normal curvature of the i lbends of the jaws and contacting with the outer faces thereof for some distance beyond the inner end of the recess 3.

By the construction and arrangement shown the holding jaws are backed up and strengthened from the extremities of the divergent ends 13 of the backing member to a point well within the recess 3, so. that when the jaws 6 are flexed by the insertion of the head of a bobbin between them the ends 13 of the backing member take up and absorb some of the strain and at the same time stiHen the jaws so that flexing movement thereoi:1 is confined wholly to such parts of the bobbin-holding device as are external to the recess 3 in the shuttle-body. As a result the walls of such recess at the inner end thereof are not separated or yflared out by continued use of the shuttle, but maintain their parallelism and continue to hold firmly and securely the jaw bases 4 and the body 19. of the backing member in place. Furthermore, as the flexing of the jaws 6 is conined to the parts altogether outside of the recess there is no working or flexing of the jaw bases el, hence the transmission of the flexing strains to the vicinity of the bolt-holes 8 is prevented, and the breakage of the holdingdevice thereat is eliminated. It is notnecessary to make the backing member any stiffer than the holding jaws, for the combined resistance to jaw flexure presented by the overlapped parts 5 and 13 serves to throw the iiexing action toward the free portions of the jaws, and prevents its transmission toward` the locality of the retaining bolt 9.

The jaws are practically reinforced at the I l n \outward bends 5 1n a manner very slmilar to the reinforcing and operation of a spring made, up of a plurality of superposed leaves, the exibility diminishing as the built up portion increases in thickness, for herein while all requisite iexibility for the jaws is provided the flexibility isy diminished to a Uopies of this patent may be obtained for minimum by the backing member at and beyond the points'where iiexure is objectionable.

Herein a usual form of bobbin guideV is shown at 15, between the holding jaws, said guide being held in position by the extensions 16, 17 above and below, respectively, the jaw bases and 'the body 12 of the backing member, and retained in place by a suitable screw 18. This guide is not a part of this invention and is substantially as shown in United States Patent No. 538,507 granted April 30, 1895 to Draper.

Various changes or modifications may be made by those skilled in the art without departing from the spirit and scope of the invention as set forth in the annexed claim.

Having fully described` my invention, what I claim as new and desire to secure by Letters Patent is:

A loom shuttle having a longitudinal recess atone end of the bobbin-receiving openling, spring holding-jaws formed on the free ends of a strip of'n'ietal bent between the jaw portions intosubstantial parallelism,

and 'provided with opposite bolt-holes, a metallic backing member embracing the parallel jaw bases and interposed between them and the walls of the recess and apertured opposite the bolt-holes, the free ends ot' said member extending beyond the recess and cooperating externally with adjacent portions of the jaws and having the normal curvature of such portions of the jaws to prevent fiexure thereof from being transmitted to their bases within the recess ot' the shuttle body and a retaining-bolt extended through the apertured backing member and the bolt-holes in the jaw bases.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

WILLIAM MCCASLIN.

l-Vitnesses:

CHAs. F. AUSTIN, E D. Oscoop.

five cents each, by alicressingv the Commissioner of Patents,

Washington, D. C, 

